如何在numpy矩阵中找到最小值？

import numpy as np

matrix = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])

min_value = np.min(matrix)

print(min_value)

import numpy as np

matrix = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
min_value = np.min(matrix)
print(min_value)

1.0